Python 无法解码 json 文件，尽管它看起来有效

我正在尝试使用以下代码加载和读取 json 文件:

try: 
    json_data = open('sample3.json') 
    data = load(json_data) 
    json_data.close() 
    insert_data(data) 
except Exception as e: 
    print "Finished with error %s" % (repr(e)) 

这是 Json 文件:

{"competitions": 
    [ 
    {"name":"Premiership","nation":"ENG","id":32711,"matches":  
        [ 
        {"id":7245940,"when":"28.02.2015 12:45", 
            "home_team": {"id":430934, "name":"West Ham"}, 
            "away_team": {"id":430936, "name":"Crystal Palace"}, 
            "played":1, 
            "play_off":0, 
            "round":27 
                ,"score":{"t1_score":1,"t2_score":3 }, 
            "score_ht":{"t1_score":0,"t2_score":1} 
        } 
        ] 
    } 
    ] 
} 

这是我得到的错误: 完成并出现错误 ValueError('No JSON object could be decoded',)

我在 JSONlint 中尝试了文件，它说它是有效的。

我做错了什么？

更新:这是 print repr(json_data.read()) 的输出

'\xef\xbb\xbf{"competitions":\n    [\n    {"name":"Premiership","nation":"ENG","id":32711,"matches": \n        [\n        {"id":7245940,"when":"28.02.2015 12:45",\n            "home_team": {"id":430934, "name":"West Ham"},\n            "away_team": {"id":430936, "name":"Crystal Palace"},\n            "played":1,\n            "play_off":0,\n            "round":27\n                ,"score":{"t1_score":1,"t2_score":3 },\n            "score_ht":{"t1_score":0,"t2_score":1}\n        }\n        ]\n    }\n    ]\n}\n' 
Finished with error ValueError('No JSON object could be decoded',) 

请您参考如下方法:

您的 JSON 文件以 UTF-8 BOM (Byte Order Mark) 开头特点; JSON 不支持这样的字符。它通常由 Microsoft 工具(如记事本)添加，用于检测编码，但字符在 UTF-8 中没有意义，因为没有字节顺序变化。

您必须直接跳过这些字节，因为即使使用 utf-8-sig 编码也无济于事。

您可以使用 codecs.BOM_UTF8检测它:

import codecs 
 
with open('sample3.json') as json_data: 
    bom_maybe = json_data.read(3) 
    if bom_maybe != codecs.BOM_UTF8: 
        # no BOM at the start, rewind 
        json_data.seek(0) 
    data = load(json_data) 
insert_data(data) 

或者，使用 io.open()在将数据传递给 json.loads() 之前加载和解码数据:

import io 
 
with io.open('sample3.json', encoding='utf-8-sig') as json_data: 
    data = json.loads(json_data.read()) 

演示:

>>> import codecs 
>>> import json 
>>> open('/tmp/test.json', 'wb').write('\xef\xbb\xbf{"competitions":\n    [\n    {"name":"Premiership","nation":"ENG","id":32711,"matches": \n        [\n        {"id":7245940,"when":"28.02.2015 12:45",\n            "home_team": {"id":430934, "name":"West Ham"},\n            "away_team": {"id":430936, "name":"Crystal Palace"},\n            "played":1,\n            "play_off":0,\n            "round":27\n                ,"score":{"t1_score":1,"t2_score":3 },\n            "score_ht":{"t1_score":0,"t2_score":1}\n        }\n        ]\n    }\n    ]\n}\n') 
>>> with open('/tmp/test.json') as json_data: 
...     bom_maybe = json_data.read(3) 
...     if bom_maybe != codecs.BOM_UTF8: 
...         json_data.seek(0) 
...     data = json.load(json_data) 
...  
>>> data 
{u'competitions': [{u'id': 32711, u'matches': [{u'score_ht': {u't2_score': 1, u't1_score': 0}, u'home_team': {u'id': 430934, u'name': u'West Ham'}, u'away_team': {u'id': 430936, u'name': u'Crystal Palace'}, u'played': 1, u'when': u'28.02.2015 12:45', u'round': 27, u'score': {u't2_score': 3, u't1_score': 1}, u'play_off': 0, u'id': 7245940}], u'name': u'Premiership', u'nation': u'ENG'}]} 
>>> with io.open('/tmp/test.json', encoding='utf-8-sig') as json_data: 
...     data = json.loads(json_data.read()) 
...  
>>> data 
{u'competitions': [{u'id': 32711, u'matches': [{u'score_ht': {u't2_score': 1, u't1_score': 0}, u'home_team': {u'id': 430934, u'name': u'West Ham'}, u'away_team': {u'id': 430936, u'name': u'Crystal Palace'}, u'played': 1, u'when': u'28.02.2015 12:45', u'round': 27, u'score': {u't2_score': 3, u't1_score': 1}, u'play_off': 0, u'id': 7245940}], u'name': u'Premiership', u'nation': u'ENG'}]}